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Retirement Plans (Tables) | 3 Months Ended
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Mar. 31, 2013
Retirement Plans [Abstract] |
Summary of Funding and Administrative Cost of Qualified Noncontributory Defined Benefit Retirement Plan and 401(k) Plan Charged to Salaries and Employee Benefits | Funding and administrative costs of the qualified noncontributory defined benefit retirement plan and 401(k) plan charged to salaries and employee benefits in the consolidated statements of income for the three-month periods ended March 31, 2013 and 2012 are as follows (in thousands):
|  | Three Months Ended |
|  | March 31, |
|  | 2013 |  |  | 2012 |
Qualified noncontributory defined benefit retirement plan |  | $ | 31 |  |  |  | 142 |
401(k) plan |  |  | 79 |  |  |  | 36 |
Components of Net Periodic Pension Cost of Nonqualified Defined Benefit Retirement Plan | The components of net periodic pension cost of the nonqualified defined benefit retirement plan for the three months ended March 31, 2013 and 2012 are summarized as follows (in thousands):
|  | Three Months Ended March 31, |
|  | 2013 |  |  | 2012 |
Service cost |  | $ | 18 |  |  |  | 22 |
Interest cost |  |  | 11 |  |  |  | 11 |
Amortization of unrecognized net (gain)/loss |  |  | 6 |  |  |  | 5 |
Amortization of unrecognized prior service cost |  |  | 7 |  |  |  | 7 |
Net periodic pension cost |  | $ | 42 |  |  |  | 45 |
Amount Recognized in Accumulated Other Comprehensive Income, Net of Deferred Federal Income Taxes for Nonqualified Defined Retirement Plan | Amounts recognized in accumulated other comprehensive income, net of deferred federal income taxes, at March 31, 2013 and December 31, 2012 for the nonqualified defined benefit retirement plan consists of (in thousands):
| March 31, |  | December 31, |
| 2013 |  | 2012 |
Net actuarial loss |  | $ | 121 |  |  |  | 125 |
Past service cost |  |  | 24 |  |  |  | 29 |
|  | $ | 145 |  |  |  | 154 |

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- Definition Tabular disclosure of the net gain (loss) and net prior service cost or credit recognized in other comprehensive income (loss) for the period for pension plans and/or other employee benefit plans, and reclassification adjustments of other comprehensive income (loss) for the period, as those amounts, including amortization of the net transition asset or obligation, are recognized as components of net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (i) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the costs related to the various types of retirement plans including defined benefit pension plan cost, defined contribution plan cost, other postretirement benefit plan cost, and net periodic benefit cost. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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- Definition Tabular disclosure of the components of net benefit costs for pension plans and/or other employee benefit plans including service cost, interest cost, expected return on plan assets, gain (loss), prior service cost or credit, transition asset or obligation, and gain (loss) recognized due to settlements or curtailments. + References Reference 1: http://www.xbrl.org/2003/role/presentationRef -Publisher FASB -Name Accounting Standards Codification -Topic 715 -SubTopic 20 -Section 50 -Paragraph 1 -Subparagraph (h) -URI http://asc.fasb.org/extlink&oid=21915506&loc=d3e1928-114920 + Details
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